Hi Bob,
Since this is somewhat off topic for this list, I have replied to Philip
directly, cc'ing yourself.
Bottom line: Implementing something like this with Plone and some RDBMS
integration should be relatively simple. For my own part, I think that
the RDBMS route has advantages over a "pure Plone" route (hey, that's
why I'm on this list!), but it's important to acknowledge that others
would disagree.
--
Regards,
PhilK
"Human language continually changes, innit."
- Stephen Juan